Not sure if this should be a bug report but I'll put it here anyway

Please describe the new feature or change.
Add support for OF Capes so the cape and colytra don't display at the same time and so that the colytra shows the texture used by the cape.

Please describe why you want this feature.
Currently the cape and colytra display at the same time which just looks really weird.

If you don't want to integrate them then an option to just disable overriding the elytra rendering would be fine and I can use my own mod to display elytras correctly.

I submitted a PR to the OF Capes mod with support for this one so I can close the issue now.